Combined forming and cut-off tool.



' C. M. SPENCER.

COMBINED FORMING AND CUT-OFF TOOL,

v APPLICATION FILED SEPT-'13. I916.

merited Apr. 24,1917.

I y I hvenfur ,5 Affarne UNITED STATES PATENT OFFICE.

' I. OI HARL'IPIOBID, CONIIECTICU'I', ASSIGNOB TO THE BBI'IAHIACHINICOMPANY, 01' NEW BBI'IAIN, CONNECTICUT, A COBPO BA'IION or common.

001mm ronume m cur-on 'roo'L.

' Specification of Letters remit. A Patented Apr. 24, 1917.

Application filed September 18, 1916. Serial No. 119,885.

To all whom it may concern:

Be it known that I I, Cmus'rornnn siding at Hartford in the county ofIIartford and State of (lonnecticut, have invented certain new anduseful Improvements in Combined Forming and Gut-Off Tools, of which thefollowin is a specification.

This invention re ates to a combined forming and cut off tool, theobject being to provide an article of this character which is effectiveand accurate in action. The tool may be advantageously-mounted in or employed in conjunction with metal-working and other machines of variouskinds, one

illustration being wherein the stock is in the form of a length or barwhich is generally rotated during the forming and cuttin oif operationsand at the conclusionof w ich the stock is released and then advancedfor a repetition of such operations, The formin portion of the tool maybe utilized in di erent -wa s, it being of particular utility, however,w en employed for chamfermg. This is but one example of several.

In the drawings accompanying and forming part of' the presentspecification I have shown in detail one convenient form of embodimentof the invention which will be set forth fully in the followingdescription. As may be inferred I do not restrict myself to thisdisclosure; I maydepart therefrom in several res ects within the scopeof the invention de description.

Referring to said drawmgs:,

Figure 1 is a side elevation and Fig. 2 a transverse section on the line2-2 of Fig. 1, lookin the direction of the arrow, of a metal-wor ngmachine equipped with a tool embodying the invention.

Fig. 3 is a face view of the tool.

Fi 4 is a bottom plan view of the same showing by dotted lines a headand the work.

Fig. 5 is a viewof the tool as seen from the left in Fig. 3. n I

Fig. 6 is a practically similar new of the cutting portion merely of thetool.

Like characters refer to like parts throughout the several views whichare on different scales; for instance Fig. 6 is on a larger scale thanFigs. 3 to 5 inclusive, while the scale ed by the claims following said,

of Figs. 1 and-2 is very much smaller than M. that of said Figs. 3 to 5.SPENCER, a citizen of the United States re- As I have practicallyalready observed, while the tool is of general use, it is of especialfacility when mounted in a metalworking machine. shown parts of such amachine comprising the base or bed 2. .Fastened as by bolts to the baseor bed 2 is a bracket as 3, constituting i, suitable support for awork-carrier as 4. he work-carrier is represented as con-. sisting of acylindrical member bored for the reception of a spindle 5 which isrotated inany way common in the art and which is provided at its frontend with a collet which is closed and opened as occasion re-' quires. Inthe present case the work rotates, although this might not always benecessary. During its rotation it is subjected to the action of thecompound tool, a piece of stock forming an article or a blank for-anarticle being cut off at the conclusion of such action. At this pointthe collet is openedand the stock advanced to bring into the range ofaction of the tool a second length of stock, at which time the operationis repeated.

The carrier for the tool hereinafter more particularly described, may beof any-suitable nature, the slide 6 answering satisfactorily in thisconnection, having suitable means also hereinafter described to whichthe tool is connected. The slide in turn may be operated in anydesirablemanner as by the cam 7 carried by the shaft 8 which is givenintermittent rotary movements as also common in metal-working andlike-func tioning machines. Supported by the bed 2 between its ends is alever as 9 serving as a convenient means to transfer the eflect of thecam to the slide, the upper end of the lever being pivoted or otherwisesuitably jointed to the slide 6 and the lower branch having a stud as 10extending into a race 11 of the earn, the construction being such thaton each intermittent rotation of the cam the slide will be given acomplete reciprocation In Figs. 1 and 2 I have to impart'an advancingmovement'to the a slide from its retracted position indicated in Fig. 2,the tool on the slide performing its oflices on the advance motion ofthe slide. When the stock is cut oil as will hereinafter appear theslide is retracted. I have deal.

scribed butbriefly certain elements of a 15 and 16 as willhereinafterappear being metal-workin mach ne. .The invention, as capableof rotary adjustment.

will beclear, Is not restricted in this particular.

As will be understood from the remarks \already made the tool comprisesa forming 'portion and a cutting 0 portion. Ob-

viously the cut off portion isiforcutting a piece of stock from theremainder. The forming portion may be utilized in any desirable manner.In the present case it is adapted for chamfering, and the chamfered orotherwise-formed part cut off from the stock may be a nut, a nut blankor any other suitable article. The work which the tool is assumed to doin-the showin made is a nut or a nut blank, the stock in this par--ticular case being hexagonal in cross section but as will be evident,the invention is not limited in this and like particulars. There is inuse 'a compound tool which is adapted to effect simultaneously formingand cut ofl" functions, but the forming part of the tool concludes itsofiice before the stock is cut off, which is an objectionable factor, inthat there is a protrusion or a bur left on the theoretically-finishedface of the article. By my tool this thing is eliminated, the resultbeing that the finished surface of the article either in complete orblank form is smooth and clean. In the present device the forming actionand the cutting action may occur and do occur contemporaneously, but theforming portion whether chamfering or otherwise, is concluded before thecut is done, the result being the high grade of work noted. I show indetail in Figs. 31:0 6 inclusive a highly-advantageous structure mandedby the scope of. my claims, restrict myself to any specific disclosure.

The tool illustrated especially in these views and also appearing on asmaller scale in Figs. 1 and 2, involves in itsorganization a mountingpart or member, the approximatel flat shank answering satisfactorily inthis particular. This shank when the tool is used as represented in saidFigs. '1.

and 2'extends transversely of the bed 2 and is sustained by adjuncts onthe slide, for instance it 'can be held fixedly in a clamp such as thatdenoted in a general wa by 13. As'shown the inner end of this ank has alaterally offset head 14 to which .the tool members or portions areconnected. There are two of such tool members or portions such'as 15 and16, the part 15 serving as a chamfering element, while the part 16 actsto 'cut off." These two elements are practically circular in shape, thepart 15 fitting flatwise against the laterally offset head 14 and beingin turn countersunk as at 17 onits outer face to'receive for turningmovement the part 16, both said parts which the-advantage inquestion canbe, 40 accomplished, but I do not, except as de- The two parts maybeassociated together and connected with the mounting or equivalent part12 in any desirable manner, although the means shown for this purposewill now be described. The said parts 15 centrally perforated to receiveand 16 are the headed stud 18 which also extends through a perforationor hole in register with the perforations or holes of said tool parts 15or 16. The portion of the stud which extends into the opening of thehead 14 is polygonal in cross section, the opening which receives saidpolygonal portion being correspondingly formed to prevent turning of thestud with respect to the head 14. The perforations or holes in the parts15 ocircular to comparatively freely receive the cylindrical portion ofthe stud 18. The back and 16 are [end of said stud is threaded toreceive the binding nut which can be operated to solidly flatwise clampthe tool parts 15 and 16 to each other and to the head 14. ,By looseningthe nut either or both of the parts 15 and 16 can berotatively adjusted,

the adjustment is obtained the set to maintain the adjustment.

and when nut will be The peripheral portion of the chamfering member 15is cut away as at 20 to produce a circumferential slot, one wall of theslot being upon a bevel as at 21, this beveled surface being intendedfor chamfering and having at one end a slight lip an initial out on thework.

22 to make The cutting oif portion -16 has a peripheral slot 23, onewall of which or' that de noted by 24 acting as the cutting off part ofthe tool. It will be noted, for instance on inspection of Fig. 3, thatthe cutting surface 24 is radial to the stock, while the cutting surface.21 is tangential to said stock. It will also be observed that thechamfering portion of the tool acts in advance of the cutting portion,the consequence being that the chamfering operationawill be concludedbefore operation.

- It will the cutting be assumed that the slide 6 is in 'its retractedposition as shown in Fig. 2,

that the shank is clamped to said slide'by the clamp 3 and that the workin the spindle 5 is held against longitudinal movement but is beingrotated in the direction {of the curved arrow. It willbe furthersupposed that the slide 6 is advanced by of the cam 7. The slide on itsthe rotation advance follows the direction of the straight arrow in saidFig. 2. On the advance of the slide the tip or point 25 of thechamfering part 15 will meet the outer surface of the work and as theslide 6 continues to advance the cham fering operation will be commencedand will be fimshed slightly before the slide has completed its advancemovement at which point ment, however, the chamfering portion will.

have completely finished its work. Beyond this point or after.thechamfering portion hascompleted its function, the cutting olf part 16will continue to act and will finish its out as the slide finishes itsadvancing movement.

By the-adjustmentof the portions or parts 15 and 16 together orseparately, the tool is adapted to articles of various shapes and sizes.

What I claim is:

1. A tool of the class described having forming and cut oflf portions tooperate re spectively tangentially and radially of the stock, theforming portion being adapted to conclude its action before the actionof the cut off portion is concluded.

2. A tool of the class described having chamfering and out ofl' portionsto act respectively tangentially and radially of the stock, thechamfering portion being adapted to conclude its action before theaction of the cut off portion is concluded. 3. A tool of the-classdescribed having a sectional circular part the sections ofwhich arerespectively provided with forming. and

cut off portions, the forming portion extending a greater distance awayfrom the axis of said circular portion than the cut oil portion.

,4. A tool of the class described having two disks fitted together, eachdisk having a cutting edge shaped for forming and cutting offoperations, the cutting edge of the formin disk being adapted to finishits action be ore the" action of the other portion is concluded,

5. A tool of the class described having two disks fitted together, eachdisk having a cutting edge shaged respectively for "forming andcutting'o operations, the cutting edge of the forming disk being adaptedto finish its action before the action of the other portion isconcluded, the two disks being coaxial and rotatively adjustable.

6. A tool' of the class described having forming and cut ofl portions,the forming portion being adapted to conclude its action before theaction of the cut off portion is concluded, and the two portions beingadapted to act approximately in the same plane at right angles totheaxis of the stock. 7. A tool of the Glass described having forming andcut ofl:' portions, the forming portion being adapted to conclude itsaction CHRISTOPHER M. SPENCER.

Witnesses:

L. L. MARKEL HEATH YSUTHERLAND.

